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Maraging Steel BS S162 (DTD 5212 / AMS 6512)
Technical Data Sheet
Alloy 250 (UNS K92890 / Maraging 250/ DTD 5212) is an age-hardenable iron-nickel steel. Alloy 250 (DTD 5212) combines ultra-high strength (1800MPa), good toughness, readily machinable in pre-aged condition, excellent transverse properties and resistance to crack propagation. Maraging 250 is used for missile and ejector systems, slat tracks and drive shafts.
| Chemical Composition Limits | ||||||||||
| Weight% | C | Si | Mn | P + S max | Cr | Mo | Ni | Ti | Co | Al |
| DTD 5212 | 0.015 max | 0.10 max | 0.10 max | P 0.01 S 0.01 | 0.25 max | 4.6-5.2 | 17-19 | 0.3-0.6 | 7-8.5 | 0.05-0.15 |
| BS S162 | 0.015 max | 0.10 max | 0.10 max | P 0.01 S 0.01 | 0.25 max | 4.6-5.2 | 17-19 | 0.3-0.6 | 7-8.5 | 0.05-0.15 |
| BS S162 is the aerospace equivalent of maraging 250 | ||||||||||
Typical Mechanical Properties
| Grade | Direction | Yield Strength (0.2% Offset) | Tensile Strength | Elongation (%) | ||
| hbar | tonfin² | hbar | tonfin² | |||
| DTD 5212 | Longitudinal | 170 min | 110 min | 180 min 200 max | 116 min 130 max | 8 min |
| DTD 5212 | Transverse | 170 min | 110 min | 180 min 200 max | 116 min 130 max | 5 min |
| Grade | Condition | Tensile Strength N/mm² | Yield Strength N/mm² | Elongation (%) | Hardness |
| S162 | Solution Treated | - | - | - | 321 max |
| S162 | Solution Treated + Aged (Long) | 1800-2000 | 1700 | 8 | 520-620 HV |
| S162 | Solution Treated + Aged (Transverse) | 1800-2000 | 1700 | 5 | 520-620 HV |
Availability
Maraging 250 is available in Bar, Billets and Forging stock. For all stock availability contact Sales.
Specifications
UNS K92890
AMS 6512 Bar and Forging Stock
WS 1.6359
MIL-S-46850
BS S162 is available in Bars
DTD 5212 is available in Bars, Billets and Forgings
MSRR 6551
MAT 102
MIA 101
